1260.cpp

class Solution 
{
public:
    vector<vector<int>> shiftGrid(vector<vector<int>>& grid, int k) 
    {
        int n = grid.size(), m = grid[0].size();
        vector<vector<int>> res(n, vector<int>(m, 0));
        for (int i = 0; i < n; i++) 
        {
            for (int j = 0; j < m; j++)
            {
                int t = j + k;
                res[(i + t / m)%n][t % m] = grid[i][j];
            }
        }
        return res;
    }
};